[@dreamingflowers]
It's an American Anime by RoosterTeeth. The first trailer is [url=https://youtu.be/pYW2GmHB5xs]here[/url] and that'll give you an idea for what to expect. The black creatures are Grimm, but the design changed when the series started to incorporate white and red masks.

[quote=@Dervish]
1. What's the posting requirements like? Length and quality has never been an issue for me, but I am juggling a few games (plus real life adulting) and would ideally like something that is once or twice a week on average for posting. 
[/quote]
To give an idea for length, I'll reference a recent post I made for another roleplay, but this will give a guide as to what you will be expecting: [url=https://www.roleplayerguild.com/posts/4255569][Link][/url]
I mentioned that it'll be up to a 10 day turn around between a particular character's posts, and with the low number of people it shouldn't be too heavy for someone. By keeping collaboration to a minimum too, you should find it easier to write in your own, rather than 5am so you can work with that one person. (Joys of being an Australian)

[quote=@Dervish]
2. Are pictures mandatory? I tend to shy away from them unless I either commission a drawing or someone's kind enough to sketch. I'd be more than happy to write up a decent description.
[/quote]
I enjoy visuals as I do come from an artistic family, but I do realise not everyone will be so inclined. If you happen to come across an image at a later date you can add it in, but if your writing and description is of a quality standard then I don't see a reason to decline.

[quote=@Dervish]3. Are characters based on motiffs like the show (e.g. fairy tales for RWBY, cross dressing warriors for JNPR)?

That's all I got for now, I love the detail and effort you put into this already and I've always had half an eye out for a RWBY game in Advanced!
[/quote]
No. I dropped the team theme name cause it's too hard to say, "your name must start with Q", and not everyone will have the same flavour when it comes to team themes.

Also nice to see someone else keeping an eye out for advance level Rwby stuff. ^-^